js remove spaces from string more than one code example

Example 1: js method string remove extra spaces

const sentence = '    My string with a    lot   of Whitespace.  '.replace(/\s+/g, ' ').trim()

// 'My string with a lot of Whitespace.'

Example 2: javascript remove space from two side of string

const string = " this contains   spaces ";    
string.replace(/\s{2,}/g, '').trim()